Many thing including most of what is said above. A phenomenon unknown to the normal population and certainly unknown to those living in Japan, japanese or not. A very odd phenomenon since for some reason this doesn't happen with other languages such as Korean, Chinese, Italian etc..
Never have I heard or read someone saying, you should give me a
lai hai, or anyon! im from korea! unless it was a joke between me and my international friends i met in japan and lived with for a year.
Seems pointless, or you speak a language or you don't. Most
japanese people would be extremely confused at the use of this
bastardization of the language, although they themselves
bastardize english. It is a case of ignorance.
As students in Japan we found it to be very pointless and weird to start talking in Japanese to each other since everyone knew enough english to comunicate. Heck, not even the japanese want to speak japanese to foreigners, or anything for that matter. I showed one of my
Japanese friends this kind of "slang" and they became very irritated at the
misuse of their language.
Warning to all who try to use japanese... if you don't speak it perfectly, don't bother. I've spent 5 years, one of those in japan studying japanese and believe me... if you went to japan and actually interacted or tried to interact and realized how different it is from the way it is portrayed to you via cartoons and movies, you would stop speaking this Japanenglish stuff.
Unacceptable Japanglish sentence: huuun? what do mean I'm "chibi-er" than that character in Robotech?
Acceptabel Japanese sentence:
naze minna wa kono japanenrishu wo tsukau nano? daikirai
dakara...
yamero!